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Granato, A.V. Johnson, Eric Carl 2011-06-02T15:32:19Z 2011-06-02T15:32:19Z 10000-01-01 1987 Ultrasonic attenuation and velocity measurements were performed to probe the structure and annealing behavior of solute self interstitial complexes in electron irradiated (T < 70 K) dilute Al-Ag and Al-Si alloys. In both alloy systems, a similar attenuation peak structure is observed. This peak structure strongly suggests that in both alloys, a defect species of <110>- monoclinic defect symmetry is present. The annealing, during Stage II, of this defect species follows a first order rate -equation which has a prefactor proportional to the solute concentration. The diaelastic effect associated with this defect is found to be comparable in magnitude and anisotropy to that attributed to <100>-self interstitial dumbbells in pure aluminum. A <110>-monoclinic mixed dumbbell model is examined as a possible explanation for these results. Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-02T15:32:19Z No. of bitstreams: 1 1987_johnson,eric.pdf: 7563709 bytes, checksum: 94345e153d77dfec3edd11f158b01c9f (MD5) Made available in DSpace on 2011-06-02T15:32:19Z (GMT). No. of bitstreams: 1 1987_johnson,eric.pdf: 7563709 bytes, checksum: 94345e153d77dfec3edd11f158b01c9f (MD5) Previous issue date: 1987 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-06-02T15:32:19Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:12:56-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis Thesis U of I Only 1411768 http://hdl.handle.net/2142/25215 en 1987 Eric Carl Johnson ultrasonic attenuation intersitial complexes electron irradiated Aluminum Alloys An ultrasonic study of impurity-interstitial complexes in electron irradiated Al-Si and Al-Ag Dissertation / Thesis text Physics Physics University of Illinois at Urbana-Champaign Dissertation Ph.D.